While Petunia was a Muggle like her parents, Lily was a Muggle-born witch and will enjoy the Wizarding world, something Mr. Evans and Mrs. Evans were very proud of. Petunia, on the other hand, was jealous and considered her sister a "freak". Mr. and Mrs. Evans suffered a normal Muggle death, though the exact cause is unknown; it was sometime before the murder of their younger daughter in 1981.
Both died sometime between 31 July, 1971 and 31 October, 1981.
In 2018, Albus Potter, one of Basil's great-grandsons, saw Basil through the Eye of the Worlds. Basil had shown himself a man stern and authoritarian man and seemed to be the only Albus' great-grandfather who owned hair.
- "I was the only one who saw her for what she was ... a freak! But for my mother and father, oh no, it was Lily this and Lily that, they were proud of having a witch in the family!"
- —Petunia to Harry Potter on Lily.
Mr. Evans and his wife were extremely proud of their youngest daughter, Lily, and was slightly in awe of her magical abilities.
However, this made Petunia feel left out and jealous of her sister.